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arXiv 0712.4119hep-thastro-phgr-qchep-ph
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自发的洛伦兹和类质破坏、质量模和引力

Spontaneous Lorentz and Diffeomorphism Violation, Massive Modes, and Gravity

Robert Bluhm, Shu-Hong Fung, Alan Kostelecky

摘要:

具有自发局部洛伦兹破坏和自同构破坏的理论包含无质量的Nambu-Goldstone模式,其作为场激发在破缺势的最小值中出现。如果势的形状也允许高于最小值的激发,那么另一种引力希格斯机制就可能出现,在这种机制中,涉及度规的质量模出现了。大质量模式的起源和基本性质的一般情况下,涉及到一个任意的张量真空值。特别注意的情况下,大黄蜂模型,这是引力耦合的矢量理论与自发的本地洛伦兹和同态破坏。模式的扩展在本地和时空框架,揭示了Nambu-Goldstone和大量的模式,通过分解的度量和熊蜂字段,并讨论了相关的对称性和规范固定。类的大黄蜂模型与麦克斯韦形式的动力学条款被用作一个重点,更详细的研究。相关的守恒定律的性质和解释作为一个候选人替代爱因斯坦-麦克斯韦理论进行了研究。明确的例子,涉及光滑和拉格朗日乘数势的研究,以说明大规模的模式,包括其起源,性质,色散规律,引力相互作用的影响的功能。在弱静态极限下,质量模场和拉格朗日乘子场对牛顿势和库仑势进行了修正。这些修改的性质和影响进行检查。

英文摘要:

Theories with spontaneous local Lorentz and diffeomorphism violation contain massless Nambu-Goldstone modes, which arise as field excitations in the minimum of the symmetry-breaking potential. If the shape of the potential also allows excitations above the minimum, then an alternative gravitational Higgs mechanism can occur in which massive modes involving the metric appear. The origin and basic properties of the massive modes are addressed in the general context involving an arbitrary tensor vacuum value. Special attention is given to the case of bumblebee models, which are gravitationally coupled vector theories with spontaneous local Lorentz and diffeomorphism violation. Mode expansions are presented in both local and spacetime frames, revealing the Nambu-Goldstone and massive modes via decomposition of the metric and bumblebee fields, and the associated symmetry properties and gauge fixing are discussed. The class of bumblebee models with kinetic terms of the Maxwell form is used as a focus for more detailed study. The nature of the associated conservation laws and the interpretation as a candidate alternative to Einstein-Maxwell theory are investigated. Explicit examples involving smooth and Lagrange-multiplier potentials are studied to illustrate features of the massive modes, including their origin, nature, dispersion laws, and effects on gravitational interactions. In the weak static limit, the massive mode and Lagrange-multiplier fields are found to modify the Newton and Coulomb potentials. The nature and implications of these modifications are examined.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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